MOSCOW, RUSSIA. SEPTEMBER 7, 2010. Russian baritone Sergei Leiferkus performs at the Moscow International Performance Arts Center. Sergei Leiferkus Sergei Leiferkus Sergei Leiferkus, Felix Korobov Sergei Leiferkus Sergei Leiferkus and Svetlana Skripkina Sergei Leiferkus Sergei Leiferkus Photo Credit: ITAR-TASS/ Alexandra Mudrats